Mechanism for working fibrous material



y 1929- H. w. JESPERSEN MECHANISM FOR WORKING FIBRQUS MATERIAL Filed Oct. 15 1926 Patented May 21, 1929.

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EELGO-WIGGO JESPERSEN, OF WESTERN SPRINGS, ILLINOIS, ASSIGNOR .TO WESTERN JELEOHLRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK.

MECHANISM FOR WORKING FIBBOUS MATERIAL.

' Applitation filed October 15, me. Serial No. 141,700.

This invention relates to improvements in mechanism for Working fibrous material, and more particularly to mechanism for forming pulpous material to constitute a homogeneous coating for cores in strand form, such as wire and the like.

The primary object of the invention is to provide an improved mechanism for rapidly and efficiently forming fibrous material on a re core to constitute a homogeneous and unin terrupted coating therefor conforming to the shape of the core.

In accordance with the general features of the invention, there is provided in one em bodiment thereof a rotatable member having an axial opening adapted to accommodate a core with a ribbon of pulp attached thereto.

A plurality of freely rotating rolls carried by the member are provided with. annular flanges which overlap each other so that the peripheral surfaces thereof are in rollmgem gagement with the attached pulpous ribbon,

thereby forming it around the core to constitute a homogeneous coating therefor conforming to the shape of the core. One of the rolls is resiliently supported whereby it is movable under tension away from the other rolls.

Uther features and advantages ofthe invention will become apparent in the follow- 1 ing detail description, reference being bad to the accompanying drawing, wherein-- Fig. 1 is a longitudinalsection, partly in elevation, of a forming mechanism embodying the features of thein'ventiom-one of the rolls being omitted for the sake of simplicity;

Fig. 2 is an end elevation thereof;

Fig. 3 is a vertical section taken on line 3r-3 of Fig. 1;

Fig. 4 is a fragmentary detail view of a portion of the mechanism shown in Fig. 1;

Figs. 5 and 6 are enlarged sectional views illustrating the manner in which the pulp is applied to the core before it is delivered to the forming mechanism, and

Figs. 7 and 8 are enlarged sectional views showing the. formation of the pulpcoating immediately after starting the forming operoperation, respectively.

The forming mechanism herein shown and described is adapted to be used in conjunction with the apparatus for coating cores with pulp shown and described in patent to ation and after the completion of'the forming H. G. Walker, No. 1,615,423, issued January 25, 192i. ln'the operation of this apparatus a core 1s brought into contact with pulpous material deposited upon a foraminous member and then an additional amount ofpulpous material is deposited upon the core and the foraminous member. The pulp so deposited and the core are then brought into contact with a felt covered squeezing roll which cooperates with the .foraminousmember to squeeze out the free liquid from the pulp. the partially dried pulp adheres to the core in the form of a ribbon with the core substantially centrally located therein, as is shown in Fig. 5 of the accompanying drawing. The core with the pulp ribbon attached thereto is then passed through a plurality of squeezing rolls which impart to the pulpous ribbon a contour such as is illustrated in Fig. 6.

A forming mechanism embodying the feanumeral 10 indicates a supporting head or 1 carrier having a threaded portion 11 by means of which it is secured to-a sleeve 12 rotatably journaled in a plurality of bearings, one of which is shown at 13. llhe sleeve12 may be rotated by any suitable means (not shown) 1 and thus constitutes means for rotating the carrier 10. The carrier 10 and sleeve 12 are provided with aligned central longitudinal apertures 14 and 15, respectively, for accommodating' a core 17 with it's attached pulpous any suitable means (not shown).

Secured to the carrier 10 and di posed coating 18 drawn axially therethrough by eccentrically with respect to the rotati g axis thereof are a pair of forwardly projecting spindles 20 and 21 (Figs. 1 and 3) upon which are rotatably supported a pair of cylindrical rolls 22 and 23, respectively. In the present embodiment of the invention,,the rotating axes of the rolls 22 and 23 are parallel to the rotating axis of the head 10, but it is to be understood that the invention should not be limited t-o this particular construction. A.

posed pin projecting from the recessed portion of the carrier 10. One end of the member 27 is formed so as to provide a suitable bearing for supporting the spindle 26 which carries the roll 24. A compression spring 32 interposed between the carrier 10 and the free, end of the member 27 serves to normally urge the roll 24 toward the rolls 22 and 23,

This movement is limited by an adjustable stop 33' threaded into the head 10 and positioned to be engaged by the roll supporting end of the member 27, as bestshown in Fig. 3. The construction is such that theroll 24 is movable under tension into aplurality of parallel positions.

Each of the rolls 22, 23 and 24 is provided with a plurality of spaced annular flanges 35 which are designed to overlap each other as best shown in Fig. 2. The arrangement is such that as the core with its attached ribbon of pulp is drawn axially through the rotating carrier 10 in the direction indicated by the arrow (Fig. 1), the peripheral surfaces of the flanges 35 are constantly in rolling enfgagement with the pulpous ribbon thereby forming it around the core and around itself so as to constitute an uninterrupted homogeneous coating for the core conforming to the shape thereof as shown in Fig. 8. The annular flanges formed upon the forward ends of the rolls are of smaller diameter and tapered-as indicated at 36. Due to this C0111 struction, the pulpous ribbon is gradually formed around the core as the core is drawn through the forming mechanism, thus preventing any'stripping of the pulp from. portions of the core. The formation of the pul ous ribbon after it is first acted upon by t e smaller flanges 35 is illustrated in Fig. 7.

. In the operation of the above described forming mechanism, the core 17 With its at tached ribbon of pulp 18 is drawn axially through the carrierAlO and sleeve 12 in the.

direction indicated by the arrow (Fig. 1), the carrier and sleeve being rotatedby any suitable means (not shown), thus causing the rolls 22,23 and 24' tobe rotated bodily around the 1 moving core. In so doing the rolls also rotate on their own axes due to the frictional contact between the pulpous ribbon and the peripheral surfaces of the flanges 35, thus causing the pulpous ribbon to be rolled on the core in the same manner as hand. This rolling action of the forming miaeot rolls reduces friction between the pulp and the forming surfaces, thus insuring against stripping of the pulp from portlons of the core.

.As hereinbefore described, the roll 24 is I mounted so as to be movable under tension into a plurality of parallel positions. This construction permits the free passage of any irregularity such as a knot or abnormal thickness of the pulpous material, thus eliminat ing any danger of the core breaking due to such causes. Furthermore, due to the action of the spring 32, the roll 24 is returned to its normal position immediately after the passage of any such irregularity, thus producing a coating which is of substantially uniform thickness throughout, the length of the core. It will be understood, also, that by adjusting the stop 33, the space between the pulp engaging flanges of the rolls 22 and 23 and the pulp engaging flanges of the roll 24 maybe changed to a cornmodate cores of various diameters or to vary the thickness or density of the pulp coating.

vWhat is cla1medisz.

.1; In a mechanism for worln'ng pulpousmaterial on a core, a forming member comprising an element movable under pressure into .a plurality of positions. wherein it engages the pulpous material and having a.

cylindrical surface constantly in rolling ongagement with said pulpous material.

2. In a mechanism for workin fibrous ma terial on a core, a forming mem er comprising a resiliently mounted element having a cylindrical surface constantly in rolling en- I gagement with said fibrous material.

3. In a mechamsm for WOIklIl fibrous material on a core, a forming mem er comprising a rotatable element movable under pressure intoa plurality of parallel positions wherein it'engages the fibrous material and having a cylindrical surface constantly in rolling engagement with said fibrous material. I I

4. In a mechanism for working fibrous material on a core, a plurality of rotatable other roll to cause the peripheral surfaces 1 thereof to constantly engage the pulpous material. c

6;. In a mechanism for workin fibrous ma-= terial on a core, a plurality of orming rolls having overlapping annular flanges constantly in rolling engagement with the fibrous material.

7. In a mechanism for working pulpous material on a core, a plurality of forming rolls having overlapping annular flanges constantly in rolling engagement with the pulpous material, one of said rolls being movable under spring tension into a plurality of parallel position in accordance with variations in the amount of pulpous material on the core.

8. In a mechanism for workin ulpous material on a core, a plurality 0% lhrming rolls having overlapping annular flanges constantly in rolling engagement with the pulpous material, one of said rolls being movable under spring tension into a plurality of par allel positions in accordance with variations in the amount of pulpous material on the core, and means for limiting said movement in a given direction.

9. In a mechanism for working pulpous material on a core, a rotatable carrier, a plurality of forming rolls eccentrically supported with respect to the axis of said carrier, each of said forming rolls having an annular flange overlapping an annular flange of the other rolls, and means for rotating said carrier whereby the peripheral surfaces of said annular flanges are constantly in rolling engagement with the pulpous material.

10. In a mechanism for working fibrous material on a core, a forming member comprising a freely rotatable element having spaced projections continually engaging the pulpous material.

11. In a mechanism for working pulpous material on a core, a forming member comprising a freely rotatable element having spaced projecting portions of progressively increasing diameter continually engaging the pulpous material.

In witness whereof, I hereunto subscribe my name this 30 day of September, A. D. 1926.

HELGO WIGGO JESPERSEN. 

